The efficiency of reaction turbine is maximum when (where α = Angle m – McqOptions

MCQOPTIONS

1.	The efficiency of reaction turbine is maximum when (where α = Angle made by the absolute velocity (V) at inlet)
A.	Vb = 0.5 V cos α
B.	Vb = V cos α
C.	Vb = 0.5 V2 cos α
D.	Vb = V2 cos α
Answer» C. Vb = 0.5 V2 cos α

Discussion

No Comment Found

Related MCQs

The ratio of the work delivered at the turbine shaft to the heat supplied is called overall thermal efficiency of turbine.
The efficiency ratio is the ratio of total useful heat drop to the total isentropic heat drop.
The Rankine efficiency depends upon total useful heat drop and total isentropic heat drop.
The ratio of the cumulative heat drop to the isentropic heat drop is called reheat factor.
The pressure velocity compounded impulse turbine allows a bigger pressure drop and hence __________ number of stages are required.
In velocity compounding of an impulse turbine, the expansion of steam takes place in a nozzle or a set of nozzles from the boiler pressure to condenser pressure.
In pressure compounding of an impulse turbine, the total pressure drop of the steam does not take place in the first nozzle ring, but is divided equally among all the nozzle rings.
The efficiency of reaction turbine is maximum when (where α = Angle made by the absolute velocity (V) at inlet)
For maximum efficiency of an impulse turbine, the steam should leave the blades at right angles to their motion.
The stage efficiency is the ratio of energy supplied to the blades per kg of steam to the total energy supplied per stage per kg of steam.